Finding the Fourth Proportional to 101,200.25, 139,658.37 and 55,878.32

Step by Step Solution

1. Step 1: Write the proportion equation
   101,200.25 : 139,658.37 = 55,878.32 : x
2. Step 2: Convert to fraction form
   101,200.25/139,658.37 = 55,878.32/x
3. Step 3: Cross multiply
   101,200.25x = 139,658.37 × 55,878.32
4. Step 4: Simplify right side
   101,200.25x = 7,803,875,089.54
5. Step 5: Solve for x
   x = 7,803,875,089.54/101,200.25
6. Step 6: Final answer
   x = 77,113.20